Is MRSA Contagious?

Picture of Symptoms of a MRSA Skin Infection

MRSA is a contagious skin infection that spreads easily through skin-to-skin contact or indirectly from person to person.

MRSA stands for methicillin-resistant Staphylococcus aureus. It is a contagious bacterial skin infection that spreads easily through skin-to-skin contact or indirectly from person to pe rson.

MRSA is very contagious under certain circumstances (when skin alterations or damage are present). It spreads through person-to-person contact with a skin infection or even indirect contact, such as contact with a MRSA-infected person's clothing or towels or even from benches in gyms.

All MRSA needs to establish itself is a small break in the skin or mucosa. This is important because no breaks means no infection; for example, MRSA skin-infected or MRSA-colonized pregnant females seldom infect their fetus or infants. However, many activities, such as kissing, saliva exchange, and sexual contact, although somewhat less likely to transfer MRSA to another, can cause infection if the skin or mucosa is damaged.

Hospitalized patients, if they have MRSA pneumonia, may transfer the organisms to others through the air by contaminated droplets. Bodies of people who die from MRSA infections often have viable MRSA on their surfaces, and these organisms can infect other people. The incubation period for MRSA ranges from 1 to 10 days.

What is the contagious period for MRSA?

As long as there are viable MRSA bacteria in or on an individual who is colonized with these bacteria or infected with the organisms, MRSA is contagious. Consequently, a person colonized with MRSA (one who has the organism normally present in or on the body) may be contagious for an indefinite period of time. In addition, MRSA organisms can remain viable on some surfaces for about two to six months if they are not washed or sterilized.

What is the incubation period for MRSA?

For most staph infections, including MRSA, the incubation period is often indefinite if the organisms are colonizing (not infecting) an individual (see above). However, the incubation period for MRSA often ranges from 1 to 10 days if it enters broken skin or damaged mucous membranes.

What does MRSA stand for?

MRSA is the short form of methicillin-resistant Staphylococcus aureus and refers to strains of gram-positive coccal-shaped (round) bacteria that are resistant to several antibiotics. MRSA causes mainly skin infections in nonhospitalized people; in hospitalized patients, it can cause sepsis, surgical site infections, and pneumonia . All of these infections may be difficult to treat because of MRSA's resistance to antibiotics.

QUESTION

How will I know I have MRSA?

Most MRSA skin infections first appear as a reddish bump that quickly becomes swollen, painful, and warm and contains or drains pus; they can occur almost anywhere on the body. The infected person may also develop a fever. Hospitalized patients may show surgical wound infections, pneumonia, or sepsis.

However, the definitive way to diagnose MRSA is to have a doctor culture the MRSA bacteria (MRSA rash skin lesion, biopsy, or nasal swab) and then show the organisms are resistant to several different antibiotics.

How is MRSA transmitted?

How easily is MRSA spread from person to person? MRSA in the community is spread from person to person by direct contact; in addition, indirect contact is also a means of spread because the bacteria can survive on objects like towels, benches, shaving equipment, and other surfaces.

For a person to become infected, MRSA usually needs to have a breach (abrasion, cut, rash, or puncture) in the skin. Can MRSA be spread in hospitals or health care settings? Hospital spread of MRSA can include the above methods, in addition, to spread by blood, saliva, and/or droplets in the air that can land on people's skin or other surfaces if the person has pneumonia. Hospitalized patients who are MRSA carriers or infected with MRSA usually are put under isolation conditions (for example, wearing gloves, masks, and gowns, and minimizing physical contact by visitors) to help prevent MRSA spread.

People who are colonized with MRSA are far less likely to transmit the organisms to others; transmission is more likely if the patient is infected with MRSA.

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How will I know I am cured of MRSA?

Many people are cured of MRSA when MRSA symptoms resolve. However, a few individuals (about 2 of 100 people) carry MRSA as either transient organisms or colonizing organisms in some body areas such as the nasal mucosa but show no signs of infection. Occasionally, people can be cured of their carrier situation by topical antibiotics when they no longer are positive for MRSA cultures.

Prevention of MRSA infections may be accomplished by good handwashing and body cleaning hygiene practices, especially after playing contact sports or if people live in crowded areas (dorms, camps, or barracks, for example). Although cleaning clothing and other items helps reduce the chance of getting MRSA, using a disinfecting agent like bleach, when feasible, offers an even better chance of prevention.

When should I contact a medical caregiver about MRSA?

Frequently asked questions

Medically Reviewed on 8/8/2024 References

United States. Centers for Disease Control and Prevention. "Methicillin-resistant Staphylococcus aureus (MRSA) Infections." June 6, 2018. .

Wisconsin Department of Health Services. "MRSA methicillin-resistant Staphylococcus aureus -- Frequently Asked Questions." Aug. 4, 2016. .

MRSA (Methicillin-resistant Staphylococcus aureus). Cleveland Clinic. Accessed July 16, 2024. https://my.clevelandclinic.org/health/diseases/11633-methicillin-resistant-staphylococcus-aureus-mrsa

Preventing Methicillin-resistant Staphylococcus aureus (MRSA). CDC. Accessed July 16, 2024. https://www.cdc.gov/mrsa/prevention/index.html

Illinois Department of Public Health. “MRSA (Pet Owners).” Accessed July 16, 2024. https://dph.illinois.gov/topics-services/diseases-and-conditions/diseases-a-z-list/mrsa-pet-owners.html

Davis, C.P. MD, PhD. “Is MRSA Contagious?” Accessed July 16, 2024. https://www.medicinenet.com/is_mrsa_contagious/article.htm

MRSA: Facts and Prevention. Mississippi State Department of Health. Accessed July 16, 2024. https://msdh.ms.gov/page/14,5514,271,341.html .

Fisher MD. “What Does MRSA Look Like?” Johns Hopkins Medicine. Accessed July 16, 2024. https://www.hopkinsmedicine.org/health/conditions-and-diseases/what-does-mrsa-look-like

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